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. 2015 May 11;10(5):e0126604. doi: 10.1371/journal.pone.0126604

Table 1. Distribution of socio-demographics, sexual behavior and HIV/syphilis prevalence among men who have sex with men in China, 2008–2009 (N = 2618).

Variables MSWs (n = 261) Other MSM (n = 2357) Overall (n = 2618)
Frequency Percent 95% CL lower 95% CL upper Frequency Percent 95% CL lower 95% CL upper Frequency Percent
Age Less than 20 43 16.48 11.95 21.01 110 4.67 3.81 5.52 153 5.84
20–29 179 68.58 62.91 74.25 1369 58.08 56.09 60.08 1548 59.13
30–39 28 10.73 6.95 14.51 500 21.21 19.56 22.87 528 20.17
40 and above 11 4.21 1.76 6.67 378 16.04 14.55 17.52 389 14.86
Marital status Never married 236 90.42 86.83 94.02 1717 72.85 71.05 74.64 1953 74.6
Ever married 25 9.58 5.98 13.17 640 27.15 25.36 28.95 665 25.4
Residence Sampling city 70 26.82 21.41 32.23 1244 52.78 50.76 54.8 1314 50.19
Same province as sampling city 85 32.57 26.84 38.29 543 23.04 21.34 24.74 628 23.99
Other provinces 106 40.61 34.62 46.61 570 24.18 22.45 25.91 676 25.82
Race Han 258 98.85 97.55 100 2299 97.54 96.91 98.17 2557 97.67
Others 3 1.15 0 2.45 58 2.46 1.83 3.09 61 2.33
Education Primary school or below 15 5.75 2.9 8.59 47 1.99 1.43 2.56 62 2.37
Junior or senior high school 206 78.93 73.95 83.91 1083 45.95 43.93 47.96 1289 49.24
College or above 40 15.33 10.93 19.72 1227 52.06 50.04 54.08 1267 48.4
Annual income 2000 and below 81 31.03 25.38 36.68 733 31.1 29.23 32.97 814 31.09
2001–6000 133 50.96 44.85 57.06 1200 50.91 48.89 52.93 1333 50.92
Above 6000 47 18.01 13.32 22.7 424 17.99 16.44 19.54 471 17.99
City which recruited Nanjing 24 9.2 5.67 12.72 355 15.06 13.62 16.51 379 14.48
Suzhou 65 24.9 19.62 30.19 190 8.06 6.96 9.16 255 9.74
Yangzhou 35 13.41 9.25 17.57 213 9.04 7.88 10.2 248 9.47
Chongqing 49 18.77 14.01 23.54 464 19.69 18.08 21.29 513 19.6
Guangzhou 7 2.68 0.71 4.65 329 13.96 12.56 15.36 336 12.83
Haerbin 30 11.49 7.6 15.39 357 15.15 13.7 16.59 387 14.78
Ji'nan 51 19.54 14.7 24.38 449 19.05 17.46 20.64 500 19.1
Knowledge No 66 25.29 19.98 30.6 474 20.11 18.49 21.73 540 20.63
Yes 195 74.71 69.4 80.02 1883 79.89 78.27 81.51 2078 79.37
Received HIV related service No 77 29.5 23.93 35.07 732 31.06 29.19 32.93 809 30.9
Yes 184 70.5 64.93 76.07 1625 68.94 67.07 70.81 1809 69.1
Venue Pub, Disco, Tearoom, or Club 95 36.4 30.52 42.27 282 11.96 10.65 13.28 377 14.4
Spa or bathhouse 30 11.49 7.6 15.39 268 11.37 10.09 12.65 298 11.38
Park or Public Restroom 39 14.94 10.59 19.3 246 10.44 9.2 11.67 285 10.89
Internet 84 32.18 26.48 37.89 1378 58.46 56.47 60.46 1462 55.84
Others 13 4.98 2.32 7.64 183 7.76 6.68 8.85 196 7.49
Sexual orientation Homosexual 125 47.89 41.79 53.99 1346 57.11 55.11 59.11 1471 56.19
 Heterosexual 19 7.28 4.11 10.45 14 0.59 0.28 0.9 33 1.26
 Bisexual 100 38.31 32.38 44.25 876 37.17 35.21 39.12 976 37.28
 Undecided 17 6.51 3.5 9.53 121 5.13 4.24 6.03 138 5.27
Experienced STI related symptoms in last year Yes 44 30.34 22.77 37.92 325 18.92 17.06 20.77 369 19.81
No 101 69.65 62.08 77.23 1393 81.08 79.23 82.94 1494 80.19
Social network size One 47 18.01 13.32 22.7 272 11.54 10.25 12.83 319 12.18
2 to 10 97 37.16 31.26 43.07 921 39.08 37.1 41.05 1018 38.88
above 10 117 44.83 38.75 50.9 1164 49.38 47.37 51.4 1281 48.93
CAI in last six months Yes 142 54.41 48.32 60.49 1299 55.11 53.1 57.12 1441 55.04
No 119 45.59 39.51 51.68 1058 44.89 42.88 46.9 1177 44.96
CAI in last anal intercourse No 198 76.45 71.24 81.65 1462 64.86 62.89 66.83 1660 66.06
Yes 61 23.55 18.35 28.75 792 35.14 33.17 37.11 853 33.94
CVI  Yes 74 28.35 22.85 33.86 415 17.61 16.07 19.14 489 18.68
No 187 71.65 66.14 77.15 1942 82.39 80.85 83.93 2129 81.32
HIV Positive 16 6.13 3.2 9.06 179 7.59 6.52 8.66 195 7.45
Negative 245 93.87 90.94 96.8 2178 92.41 91.34 93.48 2423 92.55
Syphilis Positive 28 10.73 6.95 14.51 347 14.72 13.29 16.15 375 14.32
Negative 233 89.27 85.49 93.05 2010 85.28 83.85 86.71 2243 85.68